Benzene 5/a, 5 - 40 PPM, Part # 6718801, 10 Tests

Application Range

Standard Measuring Range: 5 to 40 ppm

Number of Strokes n: 15 to 2

Time for Measurement: max. 3 min

Standard Deviation: ± 30 %

Color Change: white š red brown

Ambient Operating Conditions

Temperature: 0 to 40 °C

Absolute Humidity: max. 50 mg H2O / L

Reaction Principle

2 C6H6 + HCHO š C6H5-CH2-C6H5 + H2O

C6H5-CH2-C6H5 + H2SO4 š p-quinoid compound

Cross Sensitivity

Other aromatics (toluene, xylene) are retained in the pre-layer causing a reddish brown discoloration. If the toluene or xylene concentrations are too high the entire pre-layer up to the indicating layer is discolored making a benzene measurement impossible. Petroleum hydrocarbons, alcohols and esters do not affect the indication